Maybe this was the first time you filled an official application form. It is understandable to have made some mistakes. So if you did, now is the chance for you to make corrections. This video shows how you can make corrections in JEE Main 2018 Application Form.
Note: If candidate has not paid the fees then he/she can make any change in the whole application form but if he/she had paid the fees then he/she can make corrections in the upload images right now after the application form submission process is over then the candidates will be able to make changes other details as well.
If you have not yet applied, apply here: https://admission.aglasem.com/jee-main-application-form/
A short while after launching the online form, CBSE gave the option to “remove discrepancy in images”.
As on the date of uploading this video, one can make changes to data only if they have not yet submitted the form, and can edit images at any stage.
Once you have understood how to make corrections in form, go ahead to form correction: https://admission.aglasem.com/jee-main-application-form-correction/